add github actions ci

.github/workflows/ccpp.yml

@@ -0,0 +1,84 @@
+name: C/C++ CI
+
+on: [push]
+
+jobs:
+  linux:
+    name: Linux
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cmake
+      run: |
+              [ "$(git rev-parse --abbrev-ref HEAD)" == "master" ] && \
+              cmake -DMX_BUILD_EXAMPLES=on -DMX_BUILD_TESTS=on -DMX_BUILD_CORE_TESTS=on . || \
+              cmake -DMX_BUILD_EXAMPLES=on -DMX_BUILD_TESTS=on -DMX_BUILD_CORE_TESTS=off .
+    - name: Check Cores
+      run: |
+              export CORE_COUNT=$(nproc --all) && echo "CORE_COUNT: $CORE_COUNT" && \
+              lscpu
+
+    - name: Build
+      run: export CORE_COUNT=$(nproc --all) && make -j$CORE_COUNT
+
+    - name: Run Examples
+      run: ./MxRead && ./MxWrite
+
+    - name: Run Tests
+      run: ./MxTest
+
+  windows:
+    name: Windows
+    runs-on: windows-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cmake
+      run: |
+          cmake -DMX_BUILD_EXAMPLES=on -DMX_BUILD_TESTS=on -DMX_BUILD_CORE_TESTS=off .
+
+    - name: Build
+      run: |
+          cmake --build .
+
+    - name: List Directory
+      run: dir
+
+    #- name: List Debug Dir
+    #  run: cd x64 -and dir
+
+    - name: Run Example MxWrite
+      run: Debug\MxWrite.exe
+
+    - name: Run Example MxRead
+      run: Debug\MxRead.exe
+
+    - name: Run Tests
+      run: Debug\MxTest.exe
+
+  macos:
+    name: macOS
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Cmake
+      run: |
+          cmake -DMX_BUILD_EXAMPLES=on -DMX_BUILD_TESTS=on -DMX_BUILD_CORE_TESTS=off .
+
+    - name: Build
+      run: |
+          cmake --build .
+
+    - name: Run Example MxWrite
+      run: ./MxWrite
+
+    - name: Run Example MxRead
+      run: ./MxRead
+
+    - name: Run Tests
+      run: ./MxTest